KTM 85 SX Service Manual (2014)

KTM established the 85 SX in the early 2000s as the bridge between its smaller youth motocross machines and the full-size SX range. A dedicated 85 SX owner’s manual was already being issued for 2003, showing that KTM had positioned the model as a serious competition motorcycle for younger riders rather than as a recreational mini bike. The concept has remained consistent ever since: full motocross equipment, a high-output two-stroke engine and chassis dimensions scaled for developing racers. Over time, KTM also offered different wheel-size configurations so riders could stay on the same basic platform as they grew.

The generation that matters most for this 2014 motorcycle arrived with a major redesign for model year 2013. Contemporary testing noted that KTM reworked the 85 SX engine around a more compact cylinder with a 47 mm bore and a centrifugally controlled exhaust valve, while also revising the chromoly-steel frame, aluminium subframe and WP suspension. Those changes gave the bike a more modern chassis and a broader, more usable power delivery while preserving the hydraulic clutch and race-focused two-stroke layout. Motocross Action’s 2014 KTM 85 test describes the 2013 overhaul and the platform carried into the 2014 model year.

For 2014, the 85 SX was offered in both 17/14 and 19/16 wheel formats. The two versions share the same 84.93 cm³ liquid-cooled single-cylinder two-stroke, 47 × 48.95 mm bore and stroke, reed intake, exhaust-control system, six-speed transmission, hydraulic multi-disc wet clutch and Keihin PWK 28 carburettor. They also use KTM’s chrome-molybdenum central-tube frame, WP 4357 MXMA fork and WP 4618 PDS DCC shock. The differences are mainly in rider fit and rolling chassis: the 17/14 version uses a 220 mm front disc, 855 mm seat height and 14:46 secondary ratio, while the 19/16 version uses a 240 mm front disc, 890 mm seat height and 14:49 secondary ratio. KTM’s own model application listings separately identify both 2014 85 SX wheel-size variants.

This two-size strategy became a defining part of the model’s identity because it allowed younger racers to move from the smaller-wheel version to the larger-wheel machine without abandoning the same basic 85cc youth motocross platform. KTM has continued that approach through later generations. The company’s current 85 SX range still uses 17/14 and 19/16 configurations, while subsequent redesigns have introduced new frames, suspension systems, bodywork and engine updates. For the 2025 generation, KTM announced further engine changes aimed at improving low- and mid-range power together with slimmer bodywork and revised chassis components, showing how the 85 SX has continued to evolve while keeping the same stepping-stone role in KTM’s motocross line.

This listing is specifically for the 2014 factory Repair Manual. The source PDF is headed “REPAIR MANUAL 2014,” covers both 85 SX 17/14 and 85 SX 19/16 variants throughout the chassis specifications, and provides model-specific engine, carburetor, suspension, brake, service-schedule and wiring data. It does not establish compatibility with other model years, so the catalog coverage is intentionally limited to 2014. Related factory publications are grouped in the KTM 85 SX manual catalog.